Precise Orbit Determination of BeiDou Satellites with Contributions from Chinese National Continuous Operating Reference Stations

Chen, Ming; Liu, Yang; Guo, Jiming; Song, Weiwei; Zhang, Peng; Wu, J.; Zhang, Di

doi:10.3390/rs9080810

Cited by 8 publications

(6 citation statements)

References 36 publications

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“…The results of such kind of analyses are systematically published in reference to the different orbit models [1,[24][25][26][27][28][49][50][51][52][53][54][55][56][57]. The major innovation introduced by the GOVUS system is the near-real time of calculations and a remarkable ease of repeatability of performed analyses for every user.…”

Section: Assessment Of the Orbit Qualitymentioning

confidence: 99%

A New Online Service for the Validation of Multi-GNSS Orbits Using SLR

2017

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In the last decade, we have been witnessing a rapid development of the constellations of Global and Regional Navigation Satellite Systems (GNSS/RNSS). Besides the well-known GPS and GLONASS, newly developed systems such as Galileo, BeiDou, QZSS and NAVIC have become increasingly important. All satellites of new GNSS are equipped with laser retroreflector arrays (LRA) dedicated to Satellite Laser Ranging (SLR). SLR allows, e.g., an independent validation of microwave-based orbit products. Therefore, a fully operational online service called the multi-GNSS Orbit Validation Visualizer Using SLR (GOVUS) has been developed allowing for near real-time analysis of the quality of multi-GNSS orbits. The mean offsets of SLR residuals for Center for Orbit Determination in Europe (CODE) orbits in 2016 are at the level of −8, −38, −14, and −107 mm, for BeiDou, Galileo, GLONASS, and QZSS, respectively, with the standard deviations of 66, 36, 29, and 100 mm. Moreover, GOVUS can be used as a database containing information on equipment used at SLR stations and multi-GNSS satellite parameters. This paper includes a comprehensive description of the functionality and the structure of the developed service with exemplary analyses. The paper points out the most critical issues, limitations and challenges of multi-GNSS and SLR tracking network in the context of the SLR orbit validation. The goal of the paper and GOVUS itself is to determine: (1) what is the current quality of multi-GNSS orbits validated using SLR results; (2) what kinds of systematic errors can affect GNSS orbits and SLR observations; and (3) how to provide the online analysis tools to the broadest possible multi-GNSS community. The service has been officially operating since March 2017 as the Associate Analysis Center of the International Laser Ranging Service (ILRS ACC).

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Section: Assessment Of the Orbit Qualitymentioning

confidence: 99%

A New Online Service for the Validation of Multi-GNSS Orbits Using SLR

2017

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“…The current result is consistent with the claim that SPDOP is correlated with orbit determination accuracy, thus it can be used as a reference indicator when selecting the distribution design of CORS involved in orbit determination. Chen et al [22] also showed that that there is a correlation between accuracy of orbit determination with the geometry of CORS distribution. They proved that SPDOP has a mild influence on orbit determination for medium earth orbit satellites such as GPS and part of the BeiDou constellation.…”

Section: Spdop Analysismentioning

confidence: 98%

“…This study would recommend a SPDOP upper limit of 4500 for orbit determination using simulated measurement which promises the 3D error to be below 0.01 mm. In a study that uses real measurement, Chen et al [22] showed that cm-level accuracy in orbit determination is achievable with mean SPDOP below 100. On the other hand, Zhang et al [10] result showed that BeiDou satellite with mean SPDOP of 208.6 can have an orbit accuracy of 34cm, the lowest orbit accuracy and second highest mean SPDOP value recorded in that study for middle earth orbit satellites.…”

Section: Spdop Analysismentioning

confidence: 99%

GPS Continuously Operating Reference Station (Cors) Selection Towards Regional GPS Orbit Determination: A Simulated Study Using Trilateration Technique

Lee

Aris²,

Musa³

et al. 2022

Jurnal Teknologi

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Global Positioning System (GPS) orbital error can be minimized using precise satellite orbit. These precise satellite orbits are calculated using GPS measurements from ground CORS. The distribution of the CORS involved in GPS satellite orbit determination is important, especially in the case of regional GPS orbit determination. A regional GPS orbit is an orbital product generated using locally distributed CORS network and is expected to improve the GPS measurement in the region. Satellite Position Dilution of Precision (SPDOP) is proposed as an indicator to measure the geometry of the CORS with respect to the GPS satellite. GPS measurements are simulated by calculating the range from GPS satellites to the CORS. The simulated measurement is then used to calculate the position of GPS satellite using trilateration algorithm. Results shows the SPDOP has a linear relationship with orbit determination accuracy. This study shows that SPDOP can be used as an indicator for a better CORS selection in GPS orbit determination.

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“…Carrier-to-noise ratio (CNR) is defined as the ratio of signal power to the noise power in a unit bandwidth, and is an important indicator for evaluating signal quality in navigation reception [43]. In order to further derive the loss limit of the CNR of the robust ranging algorithm proposed in Section 4.1, the signal energy loss due to the superposition effect of the correlation function is analyzed from the energy perspective of the correlation domain.…”

Section: Analysis Of the Influence Of Adaptive Correction Filter On Cnrmentioning

confidence: 99%

A time domain anti-jamming processing algorithm for GNSS ranging receiver

Chen

et al. 2022

Front. Phys.

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Traditional anti-jamming algorithms lead to a deviation of the Global Navigation Satellite System receiver’s ranging value, which has become the main obstacle to the improvement of the accuracy of the high-precision ranging receiver. Traditional time-domain anti-jamming (TDAJ) algorithms can cause signal distortion, resulting in ranging bias. This study aims to solve this problem by proposing a design method for adding preprocessing filters in time-domain anti-jamming navigation receivers. In this method, an optimal order filter for adaptively correcting signal distortion is designed according to the time-domain anti-jamming filter coefficients. The experimental results show that the algorithm proposed in this paper can effectively solve the problem of ranging bias caused by the traditional time-domain anti-jamming algorithm. The algorithm can be widely used in dedicated satellite missions that require high positioning accuracy, such as navigation signal monitoring receivers, satellite payload receivers, and precision approach and landing systems for carrier-based aircraft.

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Precise Orbit Determination of BeiDou Satellites with Contributions from Chinese National Continuous Operating Reference Stations

Cited by 8 publications

References 36 publications

A New Online Service for the Validation of Multi-GNSS Orbits Using SLR

A New Online Service for the Validation of Multi-GNSS Orbits Using SLR

GPS Continuously Operating Reference Station (Cors) Selection Towards Regional GPS Orbit Determination: A Simulated Study Using Trilateration Technique

A time domain anti-jamming processing algorithm for GNSS ranging receiver

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